Question

A point charge causes an electric flux of `-1.0xx10^(3) Nm^(2)//C` to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. What is the value of the point charge?

Answer 1

`phi=-1.0xx10^(3)N-m^(2)//c, epsi_(0)=8.854xx10^(-12) e^(2)-N^(-1) -m^(-2)`
`q=phi epsi_(0)=-1.0xx10^(3)xx8.854xx10^(-12)=-8.85 xx10^(-9) C`
`:.` The value of point charge, `q=-8.85xx10^(-9)C`.